Fire Pumping Calculations: Every Pump Operator’s Basic Equation⁠ -------------------------------------------------------------------------⁠ The equation EP = NP FL APP ELEV is the basic equation every pump operator needs to calculate when operating the fire pump. ⁠ ⁠ Today, many pump panels have flow meters that allow the pump operator to match the readout on the pump panel with the gallon-per-minute (gpm) flow of the selected nozzle. ⁠ ⁠ This is a disservice to the integrity of the pump operato